The pick used by top musicians worldwide. Tortex® picks are carefully designed and manufactured to give the characteristic maximum memory and minimum wear that made original tortoise sell famous. Dunlop's Tortex® picks are available in a variety of shapes and gauges. Tortex® gauges correspond to these millimeters/colors unless otherwise noted: .50-Red, .60-Orange, .73-Yellow, .88-Green, 1.0-Blue, 1.14-Purple.